toy.raymond at gmail.com
Tue Jul 3 21:34:41 CDT 2012
On 7/3/12 7:14 AM, Aleksas Domarkas wrote:
> How simplify sum
> sum(4*k^2/(1-2*k+2*k^2)/(1+2*k+2*k^2),k,1,inf); ?
> The correct answer is
If you expand the summand, you get something that simplify_sum can
handle. The result involves psi of complex args, and I have no idea
how that can be simplified to your expected result. I can't even use
float and rectform to get a numerical value because the argument of
psi remains (-1)^(1/4).
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